Chapter 13 - Boiler Blowdown Water Systems & Control.
| Cl in feedwater | X 100 = % blowdown |
|---|---|
| Cl in boiler water |
Consequently, what is blowdown rate?
Rate of blowdown is a rate normally expressed as a percentage of the water feed. In the case of boilers, rate of blowdown is the removal rate of water from a boiler. Its purpose is to control boiler water parameters within prescribed limits to minimize: Scale. Corrosion.
One may also ask, what is a blowdown valve? 1. n. [ Production] A valve or system of valves that, when activated, initiates a blowdown of a pipeline, plant, process or platform; similar to an emergency shutdown valve (ESDV) that shuts in a pipeline, the BDV opens a pipeline.
Thereof, how do you calculate the blowdown of a cooling tower?
A key parameter used to evaluate cooling tower operation is "cycle of concentration" (sometimes referred to as cycle or concentration ratio). This is determined by calculating the ratio of the concentration of dissolved solids in the blowdown water compared to the make-up water.
How do you calculate boiler makeup water?
Boiler water consumption
- The water consumption consists on the control of the make-up water, the blowdown water and the condensed water quantities.
- This equation doesn't take account of the process leaks, the windage and drift which are just forms of uncontrolled blowdown.
- B=S x (1 - r) x m / b - m.
- B = Blowdown.
- S = Steam rate.
